85657479 has 16 divisors (see below), whose sum is σ = 117575040. Its totient is φ = 55429920.

The previous prime is 85657477. The next prime is 85657489. The reversal of 85657479 is 97475658.

It is not a de Polignac number, because 85657479 - 2¹ = 85657477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85657477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72564 + ... + 73734.

It is an arithmetic number, because the mean of its divisors is an integer number (7348440).

Almost surely, 2^85657479 is an apocalyptic number.

85657479 is a deficient number, since it is larger than the sum of its proper divisors (31917561).

85657479 is a wasteful number, since it uses less digits than its factorization.

85657479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870.

The product of its digits is 2116800, while the sum is 51.

The square root of 85657479 is about 9255.1325760359. The cubic root of 85657479 is about 440.8137128983.

The spelling of 85657479 in words is "eighty-five million, six hundred fifty-seven thousand, four hundred seventy-nine".